Join Date: Apr 2000
Location: Whittier, California
Pull distributor, close off hole.
Use a drill with a stop on it to go to the next thread size, drill.
Use both a starter and bottoming tap of the next size.
Install stepped stud from hardware store, re-install distributor, hold down plate and nut, set timing.
Problem fixed, and the way it should have been, aluminum intake = stud, not bolt.
The least the aluminum has bolts moved through its threads, the linger the threads/aluminum will last and not have problems.
You work with aluminum threads long enough, studs just become the default fastener.
Just what I do for this particular malfunction.